Two Columbia professors — a neuroscientist whose work on the visual system could lead to a cure for blindness and a theoretical computer scientist who has helped define the limits of computation — are among the 84 new members elected this week to the National Academy of Sciences.

A network effect known as homophily may reduce women’s visibility on social media when recommendation algorithms are added, says a new study. Above, a selfie from study coauthor Ana-Andreea Stoica's Instagram account. (Courtesy of Stoica)

A debugging tool developed by researchers at Columbia and Lehigh generates real-world test images meant to expose logic errors in deep neural networks. The darkened photo at right tricked one set of neurons into telling the car to turn into the guardrail. After catching the mistake, the tool retrains the network to fix the bug. Image Courtesy of Columbia Engineering